CN100469316C - X-ray generator and slip ring for a CT system - Google Patents
X-ray generator and slip ring for a CT system Download PDFInfo
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- CN100469316C CN100469316C CNB2004100617050A CN200410061705A CN100469316C CN 100469316 C CN100469316 C CN 100469316C CN B2004100617050 A CNB2004100617050 A CN B2004100617050A CN 200410061705 A CN200410061705 A CN 200410061705A CN 100469316 C CN100469316 C CN 100469316C
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- 238000012546 transfer Methods 0.000 claims abstract description 4
- 238000002591 computed tomography Methods 0.000 claims description 28
- 230000005611 electricity Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 2
- 239000000411 inducer Substances 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013170 computed tomography imaging Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/56—Details of data transmission or power supply, e.g. use of slip rings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/08—Electrical details
- H05G1/10—Power supply arrangements for feeding the X-ray tube
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
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Abstract
The present invention is directed to an apparatus for supplying power to a rotatable x-ray tube for generation of an x-ray beam for acquisition of CT data. The apparatus includes a slip ring to transfer power from a stationary inverter to a rotatable HV tank. The HV tank conditions the transferred power and creates a voltage potential across the x-ray tube for x-ray generation. The inverter has a single or pair of series resonant circuits connected either directly to the slip ring or indirectly through a transformer to limit frequency content and reduce common-mode component of the voltage and current waveforms carried by the slip ring as well as reduce power losses.
Description
Technical field
The present invention relates generally to adopt the diagnostic imaging system of computer tomography, more particularly, the x ray generator and the slip ring that relate to a CT system, wherein, stationary inverter provides electric power to slip ring, so that give the high voltage case that is rotating transmission of electricity, and produce a voltage potential across the X-ray tube that is rotating.
Background technology
Usually, in the imaging system of computer tomography (CT), x-ray source is to the detected object such as patient or luggage or detect segmental X-ray beam of target emission.Hereinafter, comprise can be to any object of its imaging for " detected object " and " detection target " two speech.X-ray beam projects on the radiation detector array after the decay that is subjected to inspected object.The radiant intensity that lists the X-ray beam that receives, decayed at detector array depends on the decay of the X-ray beam that caused by detected object usually.Each detecting element that detector array lists produces an isolating signal of telecommunication, in order to represent by the received attenuated beam of each detector element.This signal of telecommunication is sent to data handling system, for the final usefulness that produces the analysis of image.
Usually, x-ray source and detector array are round the rotation of the stand (gantry) in imaging plane, around detected object.X-ray source generally includes the X-ray tube of an emitting x-ray on focus.X-ray detector generally includes: one in order to be aligned in the collimator of the X-ray beam that receives on the detector; The flasher of a contiguous collimator is in order to be converted to luminous energy with X-ray beam; One in order to receive from the luminous energy on the contiguous flasher and to produce the photodiode of the signal of telecommunication.
Usually, each flasher on the scintillator arrays is converted to luminous energy with X ray.Each flasher is to the photodiode emission luminous energy adjacent with it.Each photodiode detects luminous energy and produces the corresponding signal of telecommunication.Then, the output with photodiode sends the usefulness of data handling system for the image reproduction to
The x ray generator of CT system is positioned among the stand, and in data acquisition period, it rotates round imaging thorax chamber.X-ray generator generally includes an X-ray tube, data collecting system and arcual detector array.Fig. 1 shows this well-known structure.As shown in the figure, x ray generator comprises with slip ring structure 2: X-ray tube 3, high voltage (HV) case 4 and the inverter 5 that links to each other with slip ring 6 in operation.X-ray tube 3, high voltage (HV) case 4 all link to each other with rotating base 7 with inverter 5, and are fixed on this base.When stand rotated, this base was supported each above-mentioned parts.Power distribution equipment (PDU) 8 is electrically connected in the outside of rotating base 7 and with slip ring 6, and this power distribution equipment 8 is fixed, therefore not with X-ray tube 3, high voltage (HV) case 4 and inverter 5 rotations.Usually, to inverter 5 DC voltage of feeding, for example, and 650 volts unidirectional current, and produce an AC (interchange) voltage waveform. for example, under the frequency of the 20kHz～50kHz of regulation, produce and be about 300 volts alternating current.Then, with this alternating voltage HV case 4 of feeding, the transformator and a commutator (not shown) that can produce the high direct voltage current potential is arranged in the HV case wherein.Then this high-voltage is offered X-ray tube 3.Because high voltage case and inverter are placed on the rotating base, therefore, present electric power to inverter and be easy to that lower (～650VDC) slip ring 6 is sent on the rotation side by voltage.Rotating base 7 also is designed to have one or more auxiliary device that comprise auxiliary power unit, and this auxiliary device is represented with label 4a usually.
For this structure, inverter 5 is positioned on the rotating base 7 and in data acquisition period and rotates.Fig. 2 shows the electrical schematic diagram of inverter.Inverter 5 comprises many on and off switch 9 of arranging with the H configuration (being IGBT).What link to each other with an output of H configuration is the lc circuit of a formation resonance circuit 10.The output of resonance circuit 10 and other output of H configuration 9 are fed in the HV case 4.HV case 4 comprises a transformator 11 that links to each other with filter circuit 12 with commutator, so that produce a voltage potential across one pole X-ray tube 3.Inverter 5, HV case 4 and X-ray tube 3 are positioned on the rotation side of slip ring 6.Like this,, a lower DC voltage is added on the slip ring 6, sends it to then on the inverter 5 and adjust according to this known configuration.
Inverter is placed on the rotation side of slip ring many shortcomings are arranged.For example, when stand rotates with higher speed, can produce some problems, this is because in the quality of rotation upper lateral part spare and the rotary speed that revolving force associated therewith has limited stand.In addition,, also to increase thereupon, could keep constant SNR (signal to noise ratio) the power requirement of x ray generator if improve the rotary speed of stand.Like this, just must increase the size and the quality of the parts of x ray generator, so that desired power is provided.And then in current CT system, the size of x ray generator parts has caused the cantilever structure that stretches out from rotating base.This cantilever structure is added in a moment on the mount support that is used for fixing parts, has therefore increased the power that is added on the fixed support.All these has limited the rotary speed of stand.
Therefore, wish to design a kind of like this x ray generator of structure, it can reduce the size of CT system rotating base and the restriction of weight, thereby can improve the rotary speed of stand and can not reduce the electric power that sends X-ray tube to.
Summary of the invention
The present invention proposes a kind ofly provides electric power so that produce the equipment of the X-ray beam be used for the CT data acquisition to X-ray tube, and this equipment has overcome above-mentioned many shortcomings.This equipment comprises a slip ring, and this slip ring will send rotating HV case from the electric power of stationary inverter to.This HV case is that design is used to adjust the electric power of transmission and sets up a voltage potential across X-ray tube, for usefulness that produces X ray and, this inverter is provided with directly or passes through an one series resonant circuit or the pair of series resonance circuit that transformer bay ground connection links to each other with slip ring.
Therefore, according to an aspect of the present invention, the x ray generator of CT scan device comprises a slip ring, and in order to electric power is sent to the high voltage case of rotation, the X-ray tube of rotation can link to each other with slip ring in operation, so that receive the electric power from the high voltage case.The X-ray tube of configuration is to being arranged in scanning cabin detected object emission X ray to be scanned.This x ray generator also comprises a steady inverter, in order to provide alternating current to slip ring so that transmit electricity in the high voltage case.
According to another aspect of the present invention, a CT imager comprises a rotatable stand, and an imaging chamber of running through this stand is arranged on it, also comprises the stationary base of a support stand.Slip ring is placed in the rotatable stand, and is electrically connected with X-ray tube and high voltage case.The high voltage case is to be used for a high voltage potential is added on the X-ray tube so that produce the X ray of using for data acquisition.The CT imager also comprises the electric governor that stand is outer, is added to AC voltage waveform on the high voltage case in order to receive dc voltage and to produce by slip ring.
According to another aspect of the present invention, the CT scan device comprises an X-ray tube and a high voltage case.This high voltage case is that assembling comes in order to a high-voltage is added on the X-ray tube.The CT scan device also comprises a slip ring, in order to current delivery in the high voltage case.In addition, also comprise a stationary base with inverter, this inverter provides AC electric power to slip ring, so that send to the high voltage case.This inverter comprises the resonance circuit that at least one links to each other with slip ring.
According to following detailed description and accompanying drawing, other various features, purpose and advantage of the present invention will become more clear.
Description of drawings
Following accompanying drawing shows an embodiment who is used to implement recommendation of the present invention of present imagination.
Fig. 1 is the known x ray generator of CT imaging system and the sketch map of slip ring structure
Fig. 2 is the circuit sketch map of the topological structure of a known inverter, for using with structure shown in Figure 1.
Fig. 3 is the sketch map of a CT system according to an embodiment of the invention.
Fig. 4 is the block diagram of system shown in Figure 1.
Fig. 5 is the x ray generator that illustrates according to one embodiment of present invention and the structure of slip ring.
Fig. 6 is the circuit sketch map of the topological structure of inverter in the structure shown in Figure 5 that illustrates according to another embodiment of the invention.
Fig. 7 is the circuit sketch map of another inverter topology in the structure shown in Figure 5 that illustrates according to another embodiment of the invention.
Fig. 8 is the circuit sketch map of another inverter topology in the structure shown in Figure 5 that illustrates according to another embodiment of the invention.
The sketch map of the CT system that the baggage inspection system of Fig. 9 right and wrong invasive is used together.
The specific embodiment
Below, describe embodiments of the invention in detail with reference to accompanying drawing.
Referring to Fig. 3 and Fig. 4, there is shown the imaging system 14 of a computer tomography (CT), comprising the rotary stand 15 that can represent " third generation " CT scan device.Stand 15 is positioned among the stand bearing 16 and has an X-ray tube 17, detector array 19 emitting x-ray 18 on this X-ray tube its opposite on the stand 15.Stand 15 is designed to rotatable, therefore be defined as the rotation side, and bearing 16 is non-rotary, thereby is defined as Stationary side.The slip ring (not shown) is placed on the place near the rotating base (not shown), so that send electric current in the data acquisition period rotation x ray generator parts.Rotating base is used to support X-ray tube 17, high voltage (HV) case (not shown) and other accessory (not shown) at parts when medical patient 22 is rotated.As following will being described in more detail, slip ring is to build the electric power transfer that will receive from the steady inverter (not shown) stand bearing or the base there in the HV case, so that voltage potential is added on the X-ray tube 17.What it will be appreciated by those skilled in the art that is, the present invention also can be used for launching and surveys gamma ray and other high-frequency electrical magnetic energy
Administer the rotation of stand 15 and the operation of x-ray source 17 by the control device 26 of CT system 14.Control device 26 comprises that one provides the X ray controller 28 of electric power and timing signal and the stand electric machine controller 30 in the rotary speed of a control stand 15 and orientation to x-ray source 17.Data collecting system in control device 26 (DAS) 32 extracts analog data from detector 20, and these data are converted to the usefulness that digital signal supplies processing thereafter.Image reproducer 34 receive from the sampling of DAS32 with digitized X ray data and carry out high speed image and reproduce.The image that reproduces is added in the computer 36 of memory image in massage storage 38 as an input.
Referring now to Fig. 5,, this figure shows the structure of x ray generator and slip ring according to the present invention.The structure 48 of x ray generator and slip ring comprises X-ray tube 17 and the high voltage case 50 that links to each other with rotating base 52.Rotating base 52 is placed among the stand of CT system, is used to support rotatablely moving of X-ray tube 17 and high voltage (HV) case 50.Auxiliary device 54 is also supported by rotating base 52.The HV case is to be used for changing AC signal to be added to high-voltage dc voltage on the X-ray tube 17 with generation.For example, in one embodiment, HV case 50 is to be used for producing the current potential up to 160kV that is added on the X-ray tube 17.X-ray tube produces the X ray to patient's emission to be scanned, and this X ray is a function that is added in across the voltage on the whole X-ray tube.
Resonance circuit links to each other with the output of power switch structure, and between on and off switch output and slip ring 56.Should be noted in the discussion above that in one embodiment for each changer, the inductance of resonance circuit all is the same with the value of reaction component.Resonance circuit is to be used for the quick conversion of level and smooth on and off switch, thereby limits the common mode part that frequency spectrum also reduces the waveform that sends slip ring 56 to.
Still referring to Fig. 6, slip ring 56 defined between x ray generator Stationary side and the rotation side the border as mentioned above, inverter and its relevant topological structure are placed on the Stationary side of slip ring 56.Like this, in data acquisition, inverter does not also rotate with high voltage case 50 or X-ray tube 17 together.The rotation side of x ray generator and slip ring comprises HV case 50, and it is to be used for receiving from the AC waveform of slip ring 56 and to adjust waveform so that provide high pressure DC current potential to X-ray tube 17.HV case 50 comprises transformator 66, commutator and filter circuit 68, so that adjust the AC voltage signal that is transmitted by slip ring 56.In an exemplary embodiment, HV case 50 is to be used for adding a 160kVDC current potential across X-ray tube 17.
Referring now to Fig. 7,, this figure shows the topological structure of an inverter according to another embodiment of the invention.Wherein among the embodiment, inverter 60 is similar to topological structure shown in Figure 6, and comprises that many on and off switch of arranging with the H configuration, these on and off switch are what to be used for exporting by the level and smooth AC voltage waveform of pair of series resonance circuit 62.Yet, to compare with topological structure shown in Figure 6, structure shown in Figure 7 comprises a transformator between resonance circuit output and slip ring 56.Wherein introducing transformator 70 in the structure is in order to control the effective inductance of slip ring 56.For example, suppose that slip ring 56 has an inductance, according to this inductance of difference of its gyrobearing generally at 0.2mH between the 0.6mH.By transformator 70 is joined in this circuit, effective inductance has reduced N
2, wherein, N is the turn ratio of transformator 70.For example, if the turn ratio of transformator 70 is 1:N, so, the inductance of slip ring 56 or variable quantity have just reduced 25 times, promptly reduce to 0.016mH from 0.4mH.And then the series resistance of slip ring has also reduced N
2Thereby, reduced loss.
If with turn ratio is that the transformator 70 of 1:N joins in x ray generator and the slip ring structure. just the turn ratio of transformator 66 and HV case 50 need be reduced N, the loss that causes with compensation adding transformator 70. in other words, the turn ratio of transformator 66 should be 1:X-N, wherein, N is the turn ratio of transformator 70, and X is the turn ratio of transformator 66 when not having transformator 70 in the system.For example, if the turn ratio of transformator 66 is not 8 when having transformator 70, so, just to require the turn ratio of the transformator 66 that assembled when turn ratio is 5 transformator 70 be 3 adding.In addition, the effective inductance of slip ring is Y/N
2, wherein, the inductance of the slip ring when Y equals not have transformator 70 in the topological structure of circuit
According to the description above of the present invention, in the place of removing inverter assembly and associated support from the rotation side, a common balanced body relevant with the CT system can be arranged, this balanced body can be removed, the quality that its quality equals inverter assembly is reapposed over inverter on the Stationary side of system and removes any balanced body, just can cancel any cantilevered structure and the more stand of uniformity of a balance can be provided, this is vital for 0.2 second higher stand rotating speed weekly.In addition, the high-frequency AC waveform on slip ring can allow to use contactless slip ring, thus cancellation slip ring brush.And then, by the rotation of inverter from system stressed to be put on the Stationary side, can be the size that increases generator and allow some leeway, so that the higher power stage of generation as 150kW and 200kW, this is normally needed than short scan.
Referring now to Fig. 8,, this figure shows an x ray generator and slip ring structure according to another embodiment of the invention.The similar of Fig. 8 is in the embodiment of Fig. 7; Yet the structure of Fig. 8 has only been used an one series resonant circuit 62.In this, an output of the H configuration of on and off switch 64 is presented to resonance circuit 62, and another output is directly linked on the transformator 70.The output of resonance circuit 62 also is fed on the transformator 70.Like this, will present to the usefulness of resonance circuit, meanwhile, the minus part of AC waveform directly be presented to transformator 70 by the positive part of the AC waveform of on and off switch output for smooth waveform.Similar with the embodiment among Fig. 7 to Fig. 6, inverter 60 is actionless, and X-ray tube 17 rotates.To give HV case 50 so that produce high-voltage by the current delivery that transformator 70 is sent on the slip ring 56, the high-voltage that is produced will be added on the X-ray tube 17 so that produce the usefulness of X-ray beam for the CT data acquisition.With structural similarity shown in Figure 7, the turn ratio of transformator 70 influences the turn ratio of the transformator 66 in the HV case 50 among Fig. 8.In addition, high frequency and common mode part on the slip ring waveform have also been reduced.
Referring now to Fig. 9,, the parcel/baggage screening system 100 that contains above-mentioned x ray generator, slip ring structure and inverter topology comprises a rotary stand 102, and the perforate 104 that can pass through parcel or baggage item is arranged on it.The high-frequency electromagnetic energy 106 and a detector assembly 108 are housed on the rotary stand 102.Also have a transmitter system 110, this system comprises the conveyer belt of being supported by structure 114 112, so that automatically and continuously will transmit perforate 104 to the parcel and the baggage item 116 of its scanning.Utilize conveyer belt 112 will detect target and transmitted perforate 104, acquisition of image data then, conveyer belt 112 moves parcel 116 with controlled with successive mode from perforate 104.Consequently, postal inspector, luggage management personnel and other security personnel just can check the content in the parcel 116 non-invasively, to watch whether explosive, knife, gun and contraband etc. are arranged.
Therefore, according to one embodiment of present invention, x ray generator on the CT scan device comprises one in order to the slip ring of electric power transfer in the high voltage case of rotation, also comprises a rotatable X-ray tube that is electrically connected with slip ring, so that reception is from the electric power of high voltage case.The assembling X-ray tube is for the detected object that will the scan emission X ray in being placed on the scanning cabin.X ray generator also comprises a stationary inverter, in order to providing alternating current to slip ring, so that and then transmit electricity to the high voltage case.
According to another embodiment of the invention, the CT imager comprises a rotatable stand, has the imaging chamber of passing stand on it, also comprises the stationary base of a support stand.A slip ring is placed in the rotatable stand and with X-ray tube and high voltage case is electrically connected.The high voltage case is used for applying a high-voltage to X-ray tube, so that produce the usefulness of X ray for data acquisition.The CT imager also comprises the electric governor that a stand is outer, is added to AC voltage waveform on the high voltage case in order to receive dc voltage and to produce one by slip ring.
According to another embodiment of the invention, the CT scan device comprises an X-ray tube and a high voltage case.This high voltage case is configured to be used for apply a high-voltage to X-ray tube.This CT scan device also comprises a slip ring, in order to give the high voltage case with current delivery.Also has a stationary base that has inverter, in order to providing AC electric power, so that and then transmit electricity to the high voltage case to slip ring.This inverter comprises one or a pair of resonance circuit, and they directly or by transformer bay ground connection link to each other with slip ring.
The invention has been described according to the embodiment that recommends, but will be appreciated that, the invention is not restricted to the foregoing description, under the situation that does not break away from appended claim scope, can carry out various changes and modifications.
Claims (7)
1. x ray generator of using for the CT scan device, this generator comprises:
Slip ring is in order to give electric power transfer in the high voltage case of rotation;
The rotatable X-ray tube that in operation, links to each other with slip ring, in order to the electric power of reception from described high voltage case, and to the detected object transmission X ray that will scan; And
Stationary inverter, in order to provide AC electric power to slip ring, so that to described high voltage case transmission of electricity, wherein, described stationary inverter comprises many on and off switch of arranging by H bridge configuration, this configuration has a pair of output, and each output links to each other with one of a pair of resonance circuit.
2. x ray generator according to claim 1, wherein, described a pair of resonance circuit links to each other with slip ring.
3. x ray generator according to claim 2, wherein, each resonance circuit of described a pair of resonance circuit all comprises a capacitor and inducer that is connected in series;
4. x ray generator according to claim 1, wherein, described a pair of resonance circuit links to each other with the input of transformator, and wherein this transformator has some outputs that link to each other with slip ring.
5. x ray generator according to claim 4, wherein, the turn ratio of described transformator is 1:N, the turn ratio of the transformator of described high voltage case is 1:(X-N).
6. x ray generator according to claim 5, wherein, the effective inductance of described slip ring is Y/N
2
7. x ray generator according to claim 1, this x ray generator is integrated with the CT imager (14) with rotatable stand (15).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/604,192 US6975698B2 (en) | 2003-06-30 | 2003-06-30 | X-ray generator and slip ring for a CT system |
| US10/604,192 | 2003-06-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1575759A CN1575759A (en) | 2005-02-09 |
| CN100469316C true CN100469316C (en) | 2009-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100617050A Expired - Lifetime CN100469316C (en) | 2003-06-30 | 2004-06-30 | X-ray generator and slip ring for a CT system |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US6975698B2 (en) |
| JP (1) | JP4460958B2 (en) |
| CN (1) | CN100469316C (en) |
| DE (1) | DE102004029962A1 (en) |
| NL (1) | NL1026535C2 (en) |
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| US9149250B2 (en) | 2010-06-01 | 2015-10-06 | Kabushiki Kaisha Toshiba | Ultrasound diagnosis apparatus and image-information management apparatus |
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-
2004
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- 2004-06-29 JP JP2004190610A patent/JP4460958B2/en not_active Expired - Lifetime
- 2004-06-30 NL NL1026535A patent/NL1026535C2/en not_active IP Right Cessation
- 2004-06-30 CN CNB2004100617050A patent/CN100469316C/en not_active Expired - Lifetime
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2005
- 2005-07-19 US US11/160,994 patent/US7110488B2/en not_active Expired - Fee Related
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| US9149250B2 (en) | 2010-06-01 | 2015-10-06 | Kabushiki Kaisha Toshiba | Ultrasound diagnosis apparatus and image-information management apparatus |
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| JP4460958B2 (en) | 2010-05-12 |
| NL1026535A1 (en) | 2005-01-03 |
| US20050243964A1 (en) | 2005-11-03 |
| JP2005021682A (en) | 2005-01-27 |
| US20040264642A1 (en) | 2004-12-30 |
| US7110488B2 (en) | 2006-09-19 |
| CN1575759A (en) | 2005-02-09 |
| US6975698B2 (en) | 2005-12-13 |
| NL1026535C2 (en) | 2006-03-14 |
| DE102004029962A1 (en) | 2005-01-20 |
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